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WRITING EXPRESSIONS INVOLVING PERCENT INCREASE AND DECREASE
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Here, you will practice writing expressions involving percent increase and decrease, and related concepts.
EXAMPLES:
Another name for the expression " 20% of x " is 0.2x .
Another name for the expression " 100% of x " is x .
Another name for the expression " 300% of x " is 3x .
If x increases by 20% , then the new amount is x + 0.2x = 1.2x .
If x has a 20% increase, then the new amount is 1.2x .
If x increases by 47% , then the new amount is x + 0.47x = 1.47x .
If x decreases by 30% , then the new amount is x - 0.3x = 0.7x .
If x has a 30% decrease, then the new amount is 0.7x .
If x increases by 100% , then the new amount is x + x = 2x .
If x increases by 182% , then the new amount is x + 1.82x = 2.82x .
If x increases by 200% , then the new amount is x + 2x = 3x .
If x doubles, then the new amount is 2x .
If x triples, then the new amount is 3x .
If x quadruples, then the new amount is 4x .
If x is halved, then the new amount is 0.5x .
On this exercise, you will not key in your answer.
However, you can check to see if your answer is correct.